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    <title>Document</title>

    <style>
        .nav a {
            display: inline-block;
            height: 44px;
            /* width: 100px; */
            /* padding-left: 10px; */
            /* padding-right: 10px; */
            padding: 0 20px 0 20px;
            background-color: chartreuse;
            line-height: 44px;
            text-align: center;
            
            text-decoration: none;
            margin: 20px;
        }

        .nav .bg1 {
            background-image: url(../image/1234.png);
        }
        .nav .bg1:hover {
            background-image: url(../image/loading_more.gif);
        }

        div {
            margin-top: 64px;
            background-color: royalblue;
        }  
    </style>
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<body>

    <div class="nav">
        <a href="http://" class="bg1">五彩导航</a>
        <a href="http://">导航</a>
        <a href="http://">五彩sdafsd导航</a>
        <a href="http://">五彩导航</a>
        <a href="http://">五彩导航</a>
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